[all-commits] [llvm/llvm-project] 57c311: Inline cached AST context lookup for declarations

[Mehdi Amini via All-commits]

  Branch: refs/heads/users/mamini/clang-speed-inline-ast-context
  Home:   https://github.com/llvm/llvm-project
  Commit: 57c3115be7514d89033c9ebeea9cd0aeb922a3ae
      https://github.com/llvm/llvm-project/commit/57c3115be7514d89033c9ebeea9cd0aeb922a3ae
  Author: Mehdi Amini <joker.eph at gmail.com>
  Date:   2026-09-11 (Fri, 11 Sep 2026)

  Changed paths:
    M clang/include/clang/AST/DeclBase.h
    M clang/lib/AST/DeclBase.cpp

  Log Message:
  -----------
  Inline cached AST context lookup for declarations

Route declaration context queries through the cached DeclContext path and
define the common path inline. This avoids walking to the translation unit
and removes a hot out-of-line call.

CTMark O0 (3 samples, CPU 6): 29.239400 s -> 28.975433 s (-0.903%).

Impact on significant TUs in MLIR build time:
- `mlir/lib/RegisterAllDialects.cpp`: 2.4845% fewer retired
  instructions.
- `mlir/lib/Dialect/LLVMIR/IR/NVVMDialect.cpp`: 1.4241% fewer retired
  instructions.

Assisted-by: Codex



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